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Russia invades Ukraine: the Black Sea grain and fertilizer shock

Feb 2022 –

The lesson: Chicago SRW wheat futures rose early in 2022 and later gave back part of that rise. The Black Sea disruption and subsequent changes in trade and supply are documented, but these price windows do not isolate the war’s effect or show where prices would have been without it.

What happened

On 24 Feb 2022 Ukraine's military suspended commercial shipping at its ports after the invasion; Russia closed the Azov Sea to commercial vessels; Maersk halted all Ukraine port calls the same day. Roughly five to six million tonnes a month of Ukrainian grain — mostly corn and wheat — was stranded. In March 2022 Russia's industry ministry recommended fertilizer producers temporarily halt exports, and Western sanctions cut Russian banks from SWIFT and Russian ships from EU ports. A parallel input-cost shock ran through natural gas: by September 2022 soaring European gas prices had forced the bulk of European ammonia production offline (Fertilizers Europe).

Weather context
  • Ukraine (Black Sea centroid, Odesa area) (Feb-Dec 2022): +0.53°C vs the 1991–2020 baseline; rainfall -4.5% vs baseline (259 days with <1mm rain). Near-normal weather: the 2022 shock was about ports and policy, not the harvest.

One region centroid is illustrative, not field-level truth; baseline is the 1991–2020 day-of-year mean. Weather data provided by Open-Meteo.com.

What everyone expected

RaboResearch (Apr 2022): the conflict was 'likely to push wheat prices to reach record highs,' shifting the 10-year outlook for all major crops 'up to a new price level.' Kpler (1 Mar 2022): the surge was 'a rational reaction to the possibility that Ukrainian production, alongside output in Russia, could face serious export disruptions.' Reuters (23 Mar 2022) on fertilizer: 'It all amounts to a double whammy for the global food supply.'

What the official numbers expected · USDA WASDE (as-published vintages)

What the official numbers said at the time (USDA WASDE vintages, as published): the last pre-invasion vintage (9 Feb 2022) projected world wheat ending stocks of 278 Mt for 2021/22. The March vintage - published after the invasion - revised ending stocks up to 282 Mt; the April and May vintages held at 278-280 Mt. The feared world-wheat availability collapse never appeared in the projected balance sheet; it lived in prices. (USDA WASDE, world wheat supply/use, 2021/22 marketing year, million metric tons; vintages released 9 Feb, 9 Mar, 8 Apr, 12 May 2022.)

As reported at the time: RaboResearch via Feed & Grain, Apr 2022 · Kpler, 1 Mar 2022 · Reuters, 23 Mar 2022

Observed prices and measurement limits

These are changes in the named benchmarks over the stated windows, not estimates of the event’s effect. Endpoints omit interim moves. A supply shock may have kept prices above where they would otherwise have been, even if the measured change is negative.

  • Wheat
    Jan 2022 → Mar 2022 · CBOT Chicago Soft Red Winter wheat futures (ZW=F) month-end closes
    Benchmark: Chicago SRW; not a matched Black Sea milling-wheat, KC HRW, or spring-wheat price. Protein, end use, and crop calendar affect comparability. Generic futures series; delivery months, roll dates, and roll adjustment are not documented in the bundled data.
    +32.2%

    Chicago SRW wheat rose between these month-end observations; the window includes time before the invasion.

  • Wheat
    23 Feb 2022 → 7 Mar 2022 · CBOT Chicago Soft Red Winter wheat futures (ZW=F) daily closes
    Benchmark: Chicago SRW; not a matched Black Sea milling-wheat, KC HRW, or spring-wheat price. Protein, end use, and crop calendar affect comparability. Generic futures series; delivery months, roll dates, and roll adjustment are not documented in the bundled data.
    +62.7%

    Selected pre-invasion-to-high daily-close comparison from the analytical store. This is a different sampling window from the monthly observations, not an estimate of the invasion’s causal effect.

  • Wheat
    Jan 2022 → Sep 2022 · CBOT Chicago Soft Red Winter wheat futures (ZW=F) month-end closes
    Benchmark: Chicago SRW; not a matched Black Sea milling-wheat, KC HRW, or spring-wheat price. Protein, end use, and crop calendar affect comparability. Generic futures series; delivery months, roll dates, and roll adjustment are not documented in the bundled data.
    +21.1%

    Chicago SRW wheat remained above January at September month-end, after falling from higher intervening readings.

  • Corn
    Jan 2022 → May 2022 · ZC=F month-end closes
    +20.4%

    CBOT corn rose over this broader window; the comparison does not allocate the move to the war or other drivers.

  • Corn
    Jan 2022 → Sep 2022 · ZC=F month-end closes
    +8.2%

    CBOT corn remained above January at September month-end; a smaller net change does not measure how much of the shock was offset.

  • CRU fertilizer price index
    Jan 2022 → Mar 2022 · CRU index via Financial Times reporting
    Benchmark: External: CRU fertilizer price index via Financial Times reporting, Jan→Mar 2022; not computed from our series
    +30.0%

    Contemporary press figure (FT, 21 Mar 2022), not computed from our series: the index was above 2008 record levels.

Traders were already pointing at substitutes in March 2022 — Romania, Bulgaria, Argentina, the US, India for wheat; Australia heading for another big harvest. Fertilizer prices were already at records before the invasion after 2021's run-up, so the war amplified a squeeze it didn't start. And the open question was logistics, not just production: whatever was grown still had to reach the market.

Evidence and interpretation

The record documents disrupted Ukrainian exports and reports subsequent alternative supply and trade routes. Those observations support possible channels for easing supply pressure, but their separate price contributions are not measured here. The later decline in Chicago SRW wheat cannot establish that those responses fully offset the war, or that importers buying different wheat grades faced the same outcome.

How this record has changed

Living document — every material change is logged here, newest first.

  1. New evidence2026-10-31

    The corridor diplomacy moved from Kyiv's proposal to active US review. At the G20 foreign ministers' meeting in Atlanta on Oct 31, Secretary of State Marco Rubio said the United States is reviewing proposals from Turkey and India for a limited Black Sea ceasefire that would halt attacks on grain ships and, in some cases, energy shipments, and described growing international interest in such a partial deal. No agreement has been announced, and Russia has not accepted the plan.

    Reuters, 2026-10-31 (US, Canada see growing interest in limited ceasefire in Black Sea; Rubio reviewing Turkey and India proposals)

  2. New evidence2026-10-26

    Russia's largest Black Sea grain hub has partially restarted, at a small fraction of normal volume. UkrAgroConsult reported on Oct 25 that Novorossiysk exported just 59,600 tonnes of grain in the first 20 days of October, 3.5% of the 1.7 million tonnes shipped in the same period last year, after its key grain terminals (NZT, NKHP and KSK) suspended operations on Aug 12 following attacks on port infrastructure. Even that partial resumption lifted demand from traders: wheat purchase prices in southern Russia rose by approximately RUB 600 per tonne (around $7 per tonne) in one week in mid-October.

    UkrAgroConsult, 2026-10-25 (Novorossiysk partial resumption, first 20 days of October)

  3. New evidence2026-10-19

    With Black Sea shipments halted since August, President Zelenskyy said on Oct 18 that Ukraine is in talks with Turkey, Egypt and India on reopening Black Sea civil navigation for food exports, but that Russia opposes the plan; Ukraine's Agriculture Ministry puts current exports at only 38% of regular volumes, and Kyiv has also asked the EU to renew its 'solidarity lanes'.

    Bloomberg via gCaptain, 2026-10-18

  4. New evidence2026-10-19

    September outcome data quantify the collapse the October attacks implied. Black Sea wheat loadings totalled just 1.6 million tonnes in September 2026, down 77.8% from 7.3 million tonnes in September 2025 and down 45.6% from August, the lowest September figure since 2017 (AXSMarine data reported by Splash247 on Oct 9). Ukraine's agriculture minister said Ukraine exported 2.4 million tonnes of agricultural products in September, only 46% of its potential volume, with the Danube route carrying 1.3 million tonnes (54%); alternative routes excluding the Odesa deepwater ports can handle only 45% to 50% of export potential. Russia's wheat exports fell more than 40% year on year, partly offset by record Baltic wheat loadings of 1.4 million tonnes, about 60% of Russia's September total.

    Global Agriculture, 2026-10-13, reporting AXSMarine data via Splash247 (2026-10-09) and Ukraine Agriculture Minister Taras Vysotskyi

  5. New evidence2026-10-16

    Chicago SRW wheat (ZW=F) stood at 660.0 US cents per bushel as of October 16, down 7.6 percent over 20 trading days, while the Morrowfly monitor (dashboard run 2026-10-16) scored wheat at WATCH with a supply score of 4. On October 16 UkrAgroConsult reported that Bulgaria risks losing the ability to export 5 million tons of wheat amid worsening security conditions in the Black Sea, and SeeNews reported that Bulgaria faces wheat export delays after drone attacks in the Black Sea. Expana, via marketscreener.com on October 15, reported that the EU soft wheat area could drop 2 percent for the next harvest. The counterweight in the same evidence set is Australian: UkrAgroConsult also reported on October 16 that Australia could increase global wheat supplies thanks to a strong harvest in Victoria. Resolution trigger: by 2026-12-15, observe per Bulgarian and Black Sea trade reporting whether Bulgarian wheat exports were delayed or halted and whether shipments resumed. Check-back: 2026-12-15.

    UkrAgroConsult: Bulgaria risks losing the ability to export 5 mln tons of wheat amid worsening security conditions in the Black Sea (2026-10-16) · SeeNews: Bulgaria faces wheat export delays after drone attacks in Black Sea (2026-10-16) · marketscreener.com: EU soft wheat area could drop 2% for next harvest, Expana says (2026-10-15) · UkrAgroConsult: Australia could increase global wheat supplies thanks to a strong harvest in Victoria (2026-10-16)

  6. New evidence2026-10-12

    Russia is rerouting its grain exports to the Baltic at speed while the policy response hardens. IFCHOR Galbraiths data show Russian Baltic and continental port grain loadings jumped to 1.16 mln tons in September from 216,000 tons in August, while Black Sea and Azov loadings collapsed to 201,000 tons from 1.39 mln tons; Commerzbank notes Russia's Baltic grain port capacity has nearly tripled to 23.5 Mt, though Baltic-to-Egypt freight runs 30-35% above Black Sea costs. Estonia banned Russian and Belarusian grain transit through its ports earlier in October, and Estonia, Latvia and Lithuania jointly asked the EU for an EU-wide Russian grain transit ban plus stronger EU-Ukraine Solidarity Lanes.

    Splash247, 2026-10-12 · Grain Central Daily Market Wire, 2026-10-12 · Shipping Telegraph, approx. 2026-10-04

  7. New evidence2026-10-12

    The October WASDE (released Oct 9) left Ukraine's 2026/27 wheat export forecast unchanged at 12.5 mln tons but cut Russia's by 3 mln tons to 40 mln tons, the lowest in five years, citing Black Sea logistical disruptions and a weaker shipment pace. As of Oct 7, Ukraine had exported 5.439 mln tons of grains and pulses in the 2026/27 marketing year, down 24.3% year on year, with wheat at 2.955 mln tons (down 42.2%) while corn exports roughly doubled to 1.961 mln tons. IFPRI-AMIS seminar estimates show combined Ukrainian and Russian wheat exports for July-September 2026 ran 6.5 mln tons below last year, and the shortfall could reach 10.2 mln tons by end-October, while trapped stocks build in both countries and raise the risk of a sharp price drop once shipping resumes.

    UkrAgroConsult on USDA October WASDE, 2026-10-09 · UkrAgroConsult on Ukrainian ministry export data, 2026-10-09 · UkrAgroConsult on IFPRI-AMIS seminar, approx. 2026-10-10

  8. New evidence2026-10-12

    Price action since Oct 5 shows the war premium rising then fading on US supply news. CBOT most-active wheat rose to $6.87 per bushel on Oct 5, its third straight daily gain, after Russia said it would intensify strikes on Ukrainian infrastructure. Four days later, the October WASDE release pushed CBOT December wheat down 1.79% to $246.55 per ton and December corn down 4.10% to $188.88 per ton ($4.7975 per bushel), as USDA raised US wheat ending stocks and the US corn yield forecast; MATIF December wheat fell 0.78% to 242 euros per ton. Separately, Russia claimed on Oct 12 that it struck three cargo vessels bound for Odesa and Mykolaiv plus a Mykolaiv logistics center; Reuters could not verify the claims.

    Bloomberg via Moneyweb, 2026-10-05 · UkrAgroConsult, 2026-10-09 · Reuters, 2026-10-12

  9. New evidence2026-10-12

    The war on commercial shipping escalated into NATO waters this week. On Oct 5 the Turkish-owned corn carrier Royad Mammadov, sailing from Ukraine's Izmail port, was hit by drones and sank inside Romania's exclusive economic zone, killing two crew; on Oct 6 the Togo-flagged Alfa Watan sank and the wheat carrier Able caught fire inside Bulgaria's exclusive economic zone, with Alfa Watan's crew missing. President Zelensky blamed Russian drones, while Romania did not name a suspect and Bulgaria's prime minister said the origin was unclear. Following the attacks, Black Sea war-risk insurance rates quintupled from 0.1% to 0.5% of vessel value in about two weeks, adding roughly $1.5 per ton of grain at 0.5%, with rates expected to rise toward 1%.

    Reuters via The Business Standard/TBS, 2026-10-07 · VesselHunter, 2026-10-06 · UkrAgroConsult, approx. 2026-10-08

  10. New evidence2026-10-05

    Russia has effectively renewed its blockade of Ukraine's Black Sea ports since the summer, shutting Odesa's major ports and disrupting grain exports (Reuters; FT via Asha News). Ukrainian port authorities said a Russian strike on Oct 3 hit a Liberian-flagged cargo ship in an Odesa-region port, killing one crew member and injuring three, with 13 others evacuated (Reuters). The EBRD warns of a build-up of unsold grain and oilseed stocks as the ports stay shut (UkrAgroConsult).

    Asha News summary of Financial Times reporting, Oct 5, 2026 · Reuters, Oct 3, 2026 · UkrAgroConsult on EBRD forecast, Sep 25, 2026

  11. New evidence2026-09-25

    EBRD forecasts Ukraine's grain and oilseed exports will fall 50-60% in H2 2026 as Black Sea disruptions persist; wheat prices up more than a third since Feb 2026 to about $7.50/bushel; cuts 2026 GDP growth forecast to 1.5% from 2.2%.

    UkrAgroConsult on EBRD forecast, Sep 25, 2026

  12. Correction2026-09-25

    Revised the lesson and interpretation after commodity-trader feedback: price-window comparisons do not identify causal effects, and a declining price does not establish that a supply shock had no supportive effect. Removed unsupported claims about offsetting drivers and clarified benchmark and window limits.

    Commodity-trader feedback supplied by the user; editorial review of bundled event observations (25 Sep 2026) · CME Group — Wheat futures and options specifications

  13. New evidence2026-09-23

    Ukraine's export logistics deteriorated further in the week after the last refresh. Russia damaged the Bilhorod-Dnistrovskyi rail bridge in the Odesa region (Reuters, Sep 17), sharply limiting rail access to the three Danube river ports that now handle most grain exports after Black Sea ports were effectively blocked; Ukrzaliznytsia said about 3,000 grain wagons were bound for the Danube with 26-day waits if the bridge stays closed. Ukraine exported about 930,000 tons of grain so far in September versus 1.78 Mt in the same period of September 2025 (official data, via Reuters Sep 23); Danube coaster freight stabilized near $100/ton for Egypt deliveries, up from $30/ton on July 11 when Black Sea ports were still operating. On Sep 23 Ukraine's agriculture ministry said it is exploring Baltic Sea ports for grain exports — est. up to 20 Mt/year capacity but at about +$100/ton in costs, needing up to $2B in international support — as Russian firms similarly repurpose Baltic/Arctic terminals after drone attacks on Black Sea shipments.

    Reuters, 2026-09-23 (Danube entry procedures / September export figures) · Reuters, 2026-09-23 (Baltic ports exploration) · Reuters, 2026-09-17 (bridge damage)

  14. New evidence2026-09-21

    The Black Sea supply shock is back in a new chapter: Russia attacked Ukrainian deepwater ports from late June 2026, Ukrainian grain exports collapsed roughly 76% year on year through August, and Kyiv's 2026-27 grain export forecast was cut to 29.6 Mt from 64.4 Mt (USDA FAS carries wheat at 10.8 Mt, −26% y/y, and corn at 14 Mt, −39% y/y). A Ukrainian strike on Novorossiysk on Aug 12 suspended three grain terminals, and Chicago wheat gained roughly 15% from end-June to mid-August, touching a 52-week high near $7.76/bu (775-6) on Sep 2, up roughly 18% since end-July.

    Ag Bull Trading, 14 Aug 2026 · Barchart wheat Sep '26 quotes page

  15. New evidence2026-09-15

    Added two evidence lines: ERA5 weather reanalysis context for the event window (anomaly figures vs 1991-2020 baseline; weather data provided by Open-Meteo.com) and 'what the official numbers expected at the time' from USDA WASDE as-published vintages (expectations, not outcomes). Both from Morrowfly research vintage v1_2026-09-15; raw series stay in research.

    Morrowfly research vintage v1_2026-09-15 (ERA5 reanalysis via Open-Meteo; USDA WASDE as-published vintages)

  16. Correction2026-09-15

    An independent adversarial review corrected the Russian 2022 wheat crop figure to Rosstat's final 104.2 MMT and softened the lesson to one episode's read, not a rule about shocks. No new outcome data was added.

    Morrowfly internal adversarial review (15 Sep 2026)

Transmission

  • Wheat
    export restriction

    Russia and Ukraine together were about three-tenths of world wheat exports (Reuters, Mar 2022); Ukraine's ports shut on 24 Feb 2022.

  • Corn
    export restriction

    Ukraine's ~4.5 Mt/month of corn exports stranded; Russia and Ukraine about one-fifth of world corn exports.

  • Soybeans
    input cost

    Fertilizer cost shock: Russia and Belarus over four-tenths of global potash exports; Russia ~22% of ammonia (Rabobank via Reuters, Mar 2022).

  • nitrogen and potash fertilizer
    input cost

    Not a tracked commodity — included because fertilizer cost was the war's second supply channel into every grain we track. (Fertilizer isn't one of our 17 tracked commodities.)

  • crude oil and natural gas
    input cost

    Not tracked — included because energy ran the fertilizer (gas → ammonia) and freight cost channels. European gas prices forced most of Europe's ammonia production offline by Sep 2022 (Fertilizers Europe). (Energy wasn't tracked when this analysis was written; it mattered via freight and fertilizer. Crude oil joined the watchlist in September 2026.)

Sources

Notes

  • Prices are monthly averages from our series (World Bank Pink Sheet; crude: EIA) unless noted; windows are labeled beside each number.
  • Generic futures series do not identify the delivery month at each observation or document the provider’s roll schedule and adjustment method. These price comparisons are not returns from holding one contract or following a specified roll strategy. Wheat comparisons also depend on protein, end use, and crop calendar.
  • Secondary press quotes are reported as published and were not individually audited against primary sources.
  • Illustrative scenario record. Not a prediction. Not financial advice.